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/****************************************************************************
* *
* GNAT RUN-TIME COMPONENTS *
* *
* C S T R E A M S *
* *
* Auxiliary C functions for Interfaces.C.Streams *
* *
* Copyright (C) 1992-2003 Free Software Foundation, Inc. *
* *
* GNAT is free software; you can redistribute it and/or modify it under *
* terms of the GNU General Public License as published by the Free Soft- *
* ware Foundation; either version 2, or (at your option) any later ver- *
* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
* for more details. You should have received a copy of the GNU General *
* Public License distributed with GNAT; see file COPYING. If not, write *
* to the Free Software Foundation, 51 Franklin Street, Fifth Floor, *
* Boston, MA 02110-1301, USA. *
* *
* As a special exception, if you link this file with other files to *
* produce an executable, this file does not by itself cause the resulting *
* executable to be covered by the GNU General Public License. This except- *
* ion does not however invalidate any other reasons why the executable *
* file might be covered by the GNU Public License. *
* *
* GNAT was originally developed by the GNAT team at New York University. *
* Extensive contributions were provided by Ada Core Technologies Inc. *
* *
****************************************************************************/
/* Routines required for implementing routines in Interfaces.C.Streams */
#ifdef __vxworks
#include "vxWorks.h"
#endif
#ifdef IN_RTS
#include "tconfig.h"
#include "tsystem.h"
#include <sys/stat.h>
#else
#include "config.h"
#include "system.h"
#endif
#include "adaint.h"
#ifdef VMS
#include <unixlib.h>
#endif
#ifdef linux
/* Don't use macros on GNU/Linux since they cause incompatible changes between
glibc 2.0 and 2.1 */
#ifdef stderr
# undef stderr
#endif
#ifdef stdin
# undef stdin
#endif
#ifdef stdout
# undef stdout
#endif
#endif
/* The _IONBF value in MINGW32 stdio.h is wrong. */
#if defined (WINNT) || defined (_WINNT)
#if OLD_MINGW
#undef _IONBF
#define _IONBF 0004
#endif
#endif
int
__gnat_feof (FILE *stream)
{
return (feof (stream));
}
int
__gnat_ferror (FILE *stream)
{
return (ferror (stream));
}
int
__gnat_fileno (FILE *stream)
{
return (fileno (stream));
}
int
__gnat_is_regular_file_fd (int fd)
{
int ret;
struct stat statbuf;
#ifdef __EMX__
/* Programs using screen I/O may need to reset the FPU after
initialization of screen-handling related DLL's, so force
DLL initialization by doing a null-write and then reset the FPU */
DosWrite (0, &ret, 0, &ret);
__gnat_init_float();
#endif
ret = fstat (fd, &statbuf);
return (!ret && S_ISREG (statbuf.st_mode));
}
/* on some systems, the constants for seek are not defined, if so, then
provide the conventional definitions */
#ifndef SEEK_SET
#define SEEK_SET 0 /* Set file pointer to offset */
#define SEEK_CUR 1 /* Set file pointer to its current value plus offset */
#define SEEK_END 2 /* Set file pointer to the size of the file plus offset */
#endif
/* if L_tmpnam is not set, use a large number that should be safe */
#ifndef L_tmpnam
#define L_tmpnam 256
#endif
int __gnat_constant_eof = EOF;
int __gnat_constant_iofbf = _IOFBF;
int __gnat_constant_iolbf = _IOLBF;
int __gnat_constant_ionbf = _IONBF;
int __gnat_constant_l_tmpnam = L_tmpnam;
int __gnat_constant_seek_cur = SEEK_CUR;
int __gnat_constant_seek_end = SEEK_END;
int __gnat_constant_seek_set = SEEK_SET;
FILE *
__gnat_constant_stderr (void)
{
return stderr;
}
FILE *
__gnat_constant_stdin (void)
{
return stdin;
}
FILE *
__gnat_constant_stdout (void)
{
return stdout;
}
char *
__gnat_full_name (char *nam, char *buffer)
{
#if defined(__EMX__) || defined (__MINGW32__)
/* If this is a device file return it as is; under Windows NT and
OS/2 a device file end with ":". */
if (nam[strlen (nam) - 1] == ':')
strcpy (buffer, nam);
else
{
char *p;
_fullpath (buffer, nam, __gnat_max_path_len);
for (p = buffer; *p; p++)
if (*p == '/')
*p = '\\';
}
#elif defined (MSDOS)
_fixpath (nam, buffer);
#elif defined (sgi) || defined (__FreeBSD__)
/* Use realpath function which resolves links and references to . and ..
on those Unix systems that support it. Note that GNU/Linux provides it but
cannot handle more than 5 symbolic links in a full name, so we use the
getcwd approach instead. */
realpath (nam, buffer);
#elif defined (VMS)
strncpy (buffer, __gnat_to_canonical_file_spec (nam), __gnat_max_path_len);
if (buffer[0] == '/' || strchr (buffer, '!')) /* '!' means decnet node */
strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len);
else
{
char *nambuffer = alloca (__gnat_max_path_len);
strncpy (nambuffer, buffer, __gnat_max_path_len);
strncpy
(buffer, getcwd (buffer, __gnat_max_path_len, 0), __gnat_max_path_len);
strncat (buffer, "/", __gnat_max_path_len);
strncat (buffer, nambuffer, __gnat_max_path_len);
strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len);
}
#else
if (nam[0] != '/')
{
char *p = getcwd (buffer, __gnat_max_path_len);
if (p == 0)
{
buffer[0] = '\0';
return 0;
}
/* If the name returned is an absolute path, it is safe to append '/'
to the path and concatenate the name of the file. */
if (buffer[0] == '/')
strcat (buffer, "/");
strcat (buffer, nam);
}
else
strcpy (buffer, nam);
#endif
return buffer;
}
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